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previously placed in the Order: CEPHALASPIDEA, in the Subclass: OPISTHOBRANCHIA

Class : Gastropoda  Cuvier, 1797
Clade:  Heterobranchia  J.E. Gray, 1840
Infraclade:  Lower Heterobranchia (Allogastropoda)  Haszprunar, 1985
according to Bouchet & Rocroi (2005) is the superfamily: Acteonoidea no more in the Suborder Cephalaspidea

Superfamily:  Acteonoidea  d'Orbigny, 1843
Family:  Aplustridae  J.E. Gray, 1847


Micromelo undatus
       

Class: Gastropoda   Cuvier, 1797 
Subclass:  Heterobranchia Gray J.E., 1840
Clade: Euthyneura Spengel, 1881
Clade: Euopisthobranchia Jörger et al., 2010
Clade: Cephalaspidea  Fischer, P., 1883 

Superfamily: Haminoeoidea Pilsbry, 1895
Family: Haminoeidae  Pilsbry, 1895


Haminoea cymbalum
       

Superfamily:  Philinoidea  Gray, 1850
Family:  Aglajidae  Pilsbry, 1895 (1847)


Chelidonura alisonae

Chelidonura hirundinina
     

Family:  Gastropteridae  Swainson, 1840


Sagaminopteron psychedelicum
       

 
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